Rails 4 created issue running surveyor

Sprockets stopped finding javascipt and stylesheet references
in surveyor_modified.html.erb.  Needed to explicitly include
a surveyor_add_ons manifest in generator templates.

Found three tests breaking that still need to be fixed.
x	modified:   app/views/layouts/surveyor_modified.html.erb
	new file:   lib/generators/surveyor_gui/templates/app/assets/javascripts/surveyor_add_ons.js
	new file:   lib/generators/surveyor_gui/templates/app/assets/stylesheets/surveyor_add_ons.css.sass
	modified:   lib/surveyor_gui/engine.rb